A buddy of mine offered me his 2004 315R Lampkin edition to me for $1k. It's in fairly decent condition, runs great but the only problem we can see is that the cooling fan doesn't turn on. It spins freely, coolant level is full, all the wires seem to be in tact. It doesn't have a service manual however, is there one I can download somewhere? Any tips on what to check? Thanks for the help!